Perhaps you should try some spelling variations:
chat luc » chat xuc, chat lua, nhan luc
hanh doi » thanh doi, hanh noi, hang doi
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) nang x hoi. hieu va chat luc va hanh doi ((cuu tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sac ky)) nang x hoi. hieu va chat luc va hanh doi ((cuu tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sac ky)) nang x hoi. hieu va chat luc va hanh doi ((cuu tre) or (cua te))*.